Weathering by alternating freezing and thawing of water:
a. creates angular blocks of rock.
b. dissolves granite.
c. is called heaving.
d. creates levees.
e. creates new chemical substances.
A
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What percentage of species do scientists predict we will drive to extinction by the year 2100?
A. 25-50% B. 5-10% C. 0% D. 75-100%
All of the following increase the amount of carbon dioxide in the atmosphere except
a. Respiration b. Photosynthesis c. Combustion d. Decomposition e. none of these answers
________ soils in the United States typically have thick, dark, organic-rich A horizons
A) Forest B) Rainforest C) Grassland D) Desert E) Wetland
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A) usually form at the equator. B) are strongest when they form over very warm waters. C) need cold ocean currents to trigger their formation. D) usually travel from west to east. E) are most common in the northern Pacific.